Wrench



(No Model.)

' L. P. DAVIDSON.

WRENCH. Y No. 513,308. Patented Jan. 23, 1894.

WITNESS/5S.'

UNITED STATES PATENT Orme."

LEWIS PETTY DAVIDSON, OF OWEN, WYOMING.

WRENCH.

:SPECIFICATION forming part of Letters Patent No. 513,308, dated January23, 1894.

Application tiled July 17, 1893. Serial No. 480,746. (No model.)

To all whom t may concern:

Beit known that I, LEWIS PETTY DAVIDSON, of Owen, in the county ofAlbany and State of Wyoming, have invented a new and useful Improvementin Vrenches, of which the folwhereby also a firm yet simple andreliable' locking device will .be employed for locking the jaws in theiradj usted position.

The invention consists in lthe novel constructionfand combination of theseveral parts, as will be hereinafter fully set forth and pointed out inthe claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a side elevation of the wrench. Fig. 2 is a longitudinalsection, taken practically on the line 2-2 of Fig. 1; and Fig. 3 is atransverse section taken essentially on the line 3-3 of Fig. l.

In carrying out the invention the body of the wrench consists of a shank10, which is rectangular in cross section, and a handle 11, whichwhileit is attached to the shank in some cases, is preferably madeintegral with it, and the said handle is wider than the shank, it beingmade to extend beyond the front face of the shank a predetermineddistance, forming thereby an offset 12.

In the offset of the handle a chamber 13, is formed, the chamberextending downward in the body of the handle, as shown in dotted lines,Fig. l, and in the section in Fig. 2.

At the upper end of the shank a fixed jaw 14, is secured in any approvedmanner, the said fixed jaw extending beyond the front face of the shank,and it stands at right angles to said face. An apertured guide lug 15,is projected from the front face of the shank a predetermined distanceabove the offset 12 plain or smooth.

of the handle, and the lug l5, is preferably made integral with a band16, which encircles the shank and is adapted to constitute a rest forthesliding jaw 17 of the wrench, when said jaw is in its lowestposition, or is farthest removed from the fixed jaw.

The slidingjaw is provided in its body portion with an apertureextending through from top to bottom, which aperture oropeningcorresponds in cross section to the cross section of the shank,as the shank is made to pass through the opening, and the jaw is adaptedto have free movement on the shank; therefore the opening is larger thanis absolutely necessary to accommodate the shank. The lower jaw isprovided with an adjusting rod 18, which rod is preferably screwed intothe bottom Asurface of the jaw projecting beyond the front face of theshank, so that in the event the adjusting rod should become broken orunfit for service it may be readily removed and another substituted. Therod 18 is circular in cross section, as shown in Fig. 3, and is providedupon diametricall y opposite faces with a thread 19, the threadextending from a point at or near the bottom to a point at or near thetop. Thus in cross section it will be observed that two opposite facesof the rod are threaded, whilethe other two faces are When the lower jawis upon the shank the adjusting rod 18 is passed down through theapertured guide lug 15into the chamber 13 of the handle, but before itis passed into the chamber 13 the adjusting rod is made to pass througha lock nut 20, which lock nut is held to turn between the lug 15 and theoffset 12 of the handle, andthe front face of the shank between thesepoints is concaved, as shown in Fig. 3.

The adjusting nut 20, is provided with a bore extending through it, andin diametrically opposite sides of the bore threads 21, are produced,while in the other two opposing sides recesses 22, preferably of adove-tail shape, are formed, as is likewise shown in Fig. One side ofthe adjusting nut is recessed from top to bottom, and the said recessextends substantially half-way around the nut, forming thereby twolongitudinal shoulders designated in the drawings as 2Oa and 20h, therecessed face of the nut being made to face the concaved portion of theshank;

and the nut is further provided with a lip 23, secured upon its outerface, preferably nearer one of the shoulders than the other.

In the operation of the wrench,when the nut is turned, by pressingagainst the lip 23 in such manner that the lip will be carried over indirection ofthe right-hand side of the body, for

faces of the adjusting rod,and `the lower jawl may then be carriedupward or downward to adjust it tothe object it is adapted or desired togrip, and when the adjustment is accomplishedthe nut is turned in anopposite direction until its 1eft-hand shoulder 2Ou strikes against theleft-hand forward edge ofthe shank, as -shown in positive lines in Fig..3, and at that time the lip 23 will be immediatelyin'front` of theshank. WVhen the lock nut isturned in the latter direction, itsthreadedsurface will engage with the threaded sur.; faceofithe adjustingrod, and the-lower jaw will be prevented from moving in-any direction.

It will be observed, as heretofore stated, that thewrench is exceedinglysimple, durable and economic in its construction, and'th'at itis capableof being adjusted expeditiously and conveniently, and that owing to theshoulders 20 and 20b on `the locknut, the distance thatthe nut must turncannot hemiscalcu-` I am aware that it is not new to c ut horizontalthreadsuponlthe adjusting. rod; but the threads on the rod 18substantially convert the rod into a left hand screw, and when the lip23 is `turned to the left,it causes the nut 20 to perform the doublefunction of locking the lower jaw in position and also that of crowdingthe lower jaw upward.

Having thus described my invention, I claim as new `and desire tolsecureby Letters Patent- 1. A wrench, the same consisting of a shank having anoifset at its inner end, a jaw fixed `upon its outer end, a sliding jawlocated upon "the shank, a guide carried by the shank, an

adjusting rod secured to the lower jaw, provided with broken threadsupon opposing faces, and a lock nut held to turn between the offset andguide of the shank, the said lock nut being provided with a bore havingdiametrically opposing recesses produced in its-wall, and provided withthreaded surfaces between the recesses, the lock nut being furtherprovided with stopslimiting its movement, as and for the purposespecified.`

2. In a wrenchthe` combination, with a shank, af handle forming` aportionl of the shank and provided with an offset at theft-ont face oftheshank, the oset portion of the handle having alfchamber.- producedtherein, and ajaw fixed unon thef outer` end of the shank, of aijawfheldto slide upon the shank, a guide securedupon theshanlr; abovethe `odsetof the handle; an adj ustingnod removablyattachedto thesliding jaw;saidrodibeging providedwith a broken threadupon opposing; fa'fes, therod being passed through the guideandinto the handle` chamber; and` allock` nutlocated between the `guide and the oft'set-of thehandleandrthrough whichwthe `adj ustin g rod passesfthe said iloclrnutlbeing capable of turning an'dbeing.,providedwith shoulders uponopposite facesjformingstops,

the bore through which` the; adjusting'rod passes `being provided withrecesses in opposing surfaces, the surfaces-between therecessesl beingthreaded, as .andi for-the: pur

pose set forth.

LEWIS PETTY1 DAVIDSON; Witnesses:

JOHN PRATLEY, E. E. VAN OR'rwIcH:

